print usage message if options are invalid.
authorJérôme Benoit <jerome.benoit@piment-noir.org>
Thu, 30 Nov 2017 20:27:30 +0000 (21:27 +0100)
committerJérôme Benoit <jerome.benoit@piment-noir.org>
Thu, 30 Nov 2017 20:27:30 +0000 (21:27 +0100)
commit5c1346dd169a32638aa70812aee0fc0dea3ccb70
tree78601954026a15f6d16e1e7064cfa22cb1bd83a8
parent25696723c6a45c3b7a0c33c8cbe9b2a788928694
print usage message if options are invalid.

Signed-off-by: Jérôme Benoit <jerome.benoit@piment-noir.org>
lexer/main.c